Some updated timetables for the production run of the iPhone 5, and the release schedule for iOS 5, have come to light thanks to the work of the folks at AppleInsider, as we reported early this morning. The site’s since heard a new rumor that hopes to pin down when iOS 5 will be coming as an update to existing iPhone users, based on a warning to employees.

We don’t even have a leaked memo to check out here, so if you don’t mind listening to some hearsay, the rumor has it that AppleCare operators are being prepped for a massive influx of calls on October 10. Just as retailers are blocking employees from vacationing when they expect the iPhone 5 to arrive, it looks like Apple is taking the same steps to see that customers upgrading from an older iOS version have the help they need.

If you want to take this rumor with a grain of salt, no one would blame you, but the date does fit in with some of the estimations we’ve been hearing so far. We’ll know for certain in just a few weeks, at least.